Cook the soya beans in a pan of boiling water for around 2 minutes or until tender. Drain and mix with the cooked rice in a bowl.
Add the tuna, breaking it up into flakes, then stir in the spring onion, soy sauce, lemon juice and coriander. Season to taste, and serve. Or pack into a lunchbox for later. The second portion will keep well until the next day.
Notes
If you are cooking rice from scratch, use 105g dried brown rice.